Automatic stop-valve for hydraulic elevators.



K. E. 0. JANSSON. AUTOMATIC STOP VALVL FOR HYDRAULIC ELEVATORS.

APPLICATION FILED JUNE 1, 1909. RENEWED SEPT. 20, 1912.

1,060,601 Patented May 6, 1913.

05/ V INVENTOR aw? KIWM ATTORNEY COLUMBIA PLANOGRAPH C0,.WASHINGTON. I). r

KARL E. OSSIAN JANSSON, OF NEW YORK, Y., ASSIGNOR TO JOHN SHERMAN I-IOYT, OF NEW YORK, N. Y.

AUTOMATIC STOP-VALVE FO R HYDRAULIC ELEVATORS.

Application filed. June 1, 1909, Serial No. 499,504.

To all whom it may concern Be it known that I, KARL E. OSSIAN JANssoN, a citizen of the United States, and a resident of Flushing, in the county of United States of America, have invented certain new and useful Improvements in Automatic Stop-Valves for Hydraulic Elevators, of which the following is a specification.

My invention relates to automatic stop 1 valves for hydraulic elevators, and its object is to provide a single valve of simple construction which may be used to shut off the flow of fluid in either direction, and which will allow fluid to pass through it in the opposite direction to that in which it has been shut off. I

I will describe my invention in the following specification and point out the novel features thereof in the appended claims.

Referring to the drawings, Figure 1 is a sectional side elevation of a valve made according to my invention. Fig. 2 is an end elevation of this valve. In Figs. 3 and 4 I have shown in sectional side elevation and in end view, respectively, a modified form of my invent-ion.

Like characters of reference designate corresponding parts in all of the figures.

10 designates a piston rod upon which are mounted three pistons 11, 12 and 13.

14 is a weight upon the piston rod arranged to hold the piston rod and its connected parts in their lower position, and, as will appear hereinafter, the valve in its open position, when unacted upon by external forces. A yoke 15 which is connected with the piston rod extends down over the valve and carries a locking member 16 which is in alinement with the piston rod, and by this connection is arranged to move in unison with it.

17 and 18 are pipes connected with opposite sides of the valve.

20 is the valve cylinder which is preferably made in two sections and placed within a casing 21. The lower portion of the casing is constructed to form a chamber 22.

23 is a passage formed in the casing and leading to the cylinder through a port 24, and to chamber 22 through port 25. Above the latter port is a puppet valve 26, the stem 27 of which projects into the chamber 22. The pipe 17 is connected with this passage Specification of Letters Patent.

Patented May 6, 1913.

Renewed September 20, 1912. Serial No. 721,522.

23. In the other side of the casing is a passage 28 connected with the pipe 18' and leading to the valve cylinder through port 3 30, and to chamber 22 through port 31. Queens, in the city and State of New York, 1

32 is a puppet valve above port 31, and 33 is its stem which projects into the chamber 22. Within the chamber 22 is a swinging controlling blade 34 which is pivoted at 135 and provided with a pair of laterally extending arms 36 and 37 38 is an antifriction roller which may be provided near the lower end of the blade 34. Before describing the other figures of the drawings I will point out the operation of this valve.

The pipes 17 and 18 are to be connected with a hydraulic elevator installation or other apparatus in such a way as to lead water or other fluid to and from the motor cylinder or other desired device. The automatic stop valve is interposed between these pipes so that when it is open the fluid may flow through it in either direction. In the drawings the valve is shown in its closed position, but when it is not acted upon by eX- ternal forces, the weight 14 holds the piston rod and its connected parts down so that the piston 12 is below the port 24, but the piston 13 is still above the port 30. The space bet-ween these pistons 12 and 13 affords a free passage for the fluid between the cylinder ports 24 and 30. When the controlling blade 34 is in its central position its projecting arms 36 and 37 will engage the valve stems 27 and 33, respectively, and hold both of the valves off from their seats. When fluid is flowing through the valve in either direction there will be a tendency for some of it to flow through the chamber 22 in the same direction. In other words, if the flow is from pipe 17 to pipe 18 there will be greater pressure in the passage 23 and against valve 26 than there will be in passage 28 and against valve 32. This difference of pressure on the valves as well as the consequent flow of fluid through chamber 22 will swing the controlling blade 34 over to the left as shown in Fig. 1. It will then allow the valve 26 to seat but will hold valve 32 wider open. An upward movement of the piston will close the passage between ports 24 and 30. The puppet valve 26 is seated so that none of the fluid can pass into the chamber 22 through the port which it controls; consequently, no fluid can flow from the pipe 17 to the pipe 18. The upward move ment of the piston rod has caused the looking member 16 to be pushed up. This looking member projects into the valve chamber 22 through a stuffing-box 19, and when thus moved up, is arranged to engage with the controlling blade so that the latter will be positively held over in the position shown. Should it be desired to pass fluid through the valve in the direction opposite to that in which its flow has thus been cut off, or from the pipe 18 to pipe 17 this may be done. The flow will then pass through passage 28 into chamber 22, past the valve 32 which is held open, and past valve 26 which is free to open and now acts as a check-valve, and through passage 23 to the pipe 17.

The operation will be similar to that above described if the flow of fluid from pipe 18 to pipe 17 is cut off by the movement of the pistons. A flow in that direction will cause the controlling blade 34 to be swung to the right so that it will allow puppet valve 32 to act as a check-valve and will hold valve 26 open. Then the raising of the pistons will shut off the flow of fluid from the pipe 18 to pipe 17, but it may still flow through the bypass formed by chamber 22 in the opposite direction.

The essential features of the valve shown in Figs. 3 and 4 are similar to those above described. In this case, however, the chamber 22 differs somewhat in shape, and the valves 26 and 32 are set with their stems 27 and 33 depending vertically. 4O designates a main or controlling valve connected with the pipe 17 and arranged to make connection between the latter and either a sup ply pipe 41 or an exhaust pipe 42 to determine the direction of flow of fluid through the automatic stop valve. 43 is the piston rod of this controlling valve which is mechanically connected with the locking mechanism of the stop valve. 44 is a housing pivotally connected with the piston rod 43 and supporting a pair of springs 45 and 46 which press against the enlarged end 47 of a connecting rod 48 and resiliently connect it with the piston rod 43. The other end of this rod is pivotally connected at 49 with the lower arm 50 of a T-shaped lever which is pivoted at 51 in the lower end of a yoke 52. Thisyoke is carried around the valve and supports the weights 14 which tend to hold the valve open. The piston rod 10 is also connected at 53 to move with this yoke. 54 and 55 are the upper ends of the T-shaped lever and these extend into position to engage with the valve stems 27 A and 33*. When the controlling valve is moved into position to connect supply pipe 41 with the automatic stop valve its piston rod 43 is moved to the left, thus swinging the T1. shaped lever to the side at which it is shown.

Now, if the automatic stop valve is closed while the parts are in this position the T- shaped controlling lever will be pulled up and will be locked in this tilted position so that it will remain so even should the piston rod 43 be released. The locking is accomplished by means of a roller 56 which projects from one side of the lower end of the arm 50, riding up upon the sides of a stationary projection 57 which depends downwardly from the lower end of the stop valve. As in the other case, this lever will hold' one of the puppet valves open so that the fluid may be passed through the valve in the 0pposite direction to that from which it has been shut off. This valve is a single-acting valve which performs the functions of a double-acting valve, and in elevator work, will accomplish the work for which two valves are'often employed. By its use a pull in one direction will stop either the upward or downward movement of an elevator. This fact makes it possible to provide a very simple actuating mechanism for the valve. In another application, Serial Number 449,503 which is filed herewith I have shown some of the ways in which this valve may be actuated by the movement of the elevator mechanism. The pistons are so arranged that they are balanced in each of their positions.

The principles herein disclosed may be worked out in several ways, and I have described more than one construction to show that I do not limit myself to any specific form or construction.

WVhat I claim is l. A valve having one open and a single closed position and arranged to shut off the flow of fluid through it in either direction, said valve comprising means governed by the direction of flow at the time the valve is moved to its closed position and cont-rolled by such closing movement of the valve for permitting the passage of fluid through it in a direction opposite to that in which it has been shut off.

2. A valve having an open position for allowing fluid to flow through it in either direct-ion, means for holding the valve open when unacted upon by external forces, said valve comprising a by-pass for allowing fluid to flow around the valve when the latter is closed, and means for preventing the fluid from flowing through the bypass in the direction in which it was flowing through the valve at the time said valve was closed governed by the direction offlow at the time the valve is moved to its closed position and controlled by such closing movement of the valve.

3. A valve having an open position for allowing fluid to flow through it in either direction, a casing, for said valve constructed to form a by-pass around the valve, op-

positely disposed check-valves in said bypass, and means actuated by the movement of the valve for holding one or the other of said check-valves open when said valve is closed.

4. A valve having an open position for allowing fluid to flow through it in either direction and a closed position for shutting off said flow,a casing in said valve constructed to form a bypass around the valve, oppositely disposed check-valves in said by-pass, means dependent upon the direction of flow for holding one or the other of said checkvalves open, and means actuated by the dos ing of the valve for locking the open checkvalve in its open position.

5. A valve having an open position for allowing fluid to flow through it in either direction, and a closed position for shutting ofi said flow, a casing for said valve constructed to form a by-pass around the valve, oppositely-disposed check-valves in said bypass, a pivoted lever arranged to hold one of the check-valves open when the flow through the valve is in one direction, and the other check-valve open when the flow is in the opposite direction, and means actuated by the closing of the valves for looking the lever in its holding position.

6. A valve having an open position for allowing fluid to flow through it in either direction, and a closed position for shutting off said flow, a casing for said valve constructed to form a chamber and connecting passages around the valve, oppositely disposed check-valves in said passages, a con.- troller blade pivotally mounted within the said chamber arranged to hold one of the check-valves open when the flow through the valve is in one direction, and the other check-valve open when the flow is in the opposite direction, and means actuated by the closing of the valve for locking the lever in its holding position.

7. A valve comprising a cylinder provided with ports, pistons within said cylinder, said pistons having an open position for allowing fluid to flow through the valve in either direction and a closed position for shutting off said flow, a casing for said valve constructed to form a chamber and connecting passages around the valve, oppositely disposed checkvalves for said passages, a controller blade pivotally mounted within said chamber arranged to hold one of the check-valves open when the flow through the valve is in one direction, and the other check-valve open when the flow is in the opposite direction, and a locking member connected to move with the pistons for locking the lver in one or the other of its holding positions, dependent upon the direction of flow through the valve at the time it is closed.

8. A valve having an open position for allowing fluid to flow through it in either direction, a casing for said. valve constructed to form a by-pass around the valve, oppositely disposed check-valves in said by-pass, controlling means for said check-valves, and means dependent upon the direction of flow of fluid through said valve for actuating the controlling means.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

KARL E. OSSIAN JANSSON.

Witnesses:

PRICE T. BRUYERE, ERNEST WV. MARSHALL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents Washington, D. C. 

